While listed as a breed, frizzling is a genetic modification that can be easily introduced into any population of chickens. It causes each feather to curl back toward the bird's head instead of lying naturally pointed toward the tail. However, there are certain breeds of chickens which display this characteristic more often such as: Cochin, Plymouth Rock, Japanese and Polish. The mutation is the result of a single gene. For more information on the mutation please look to the online Mendelian Inheritance in Animals.

 

 

References

Chicken Breeds and Varieties (A2880), John L. Skinner, University of Wisconsin-Madison

Haggarty, Laura. "Frizzles: One of Our Odd "Breeds" by Laura Haggarty from the October/November, 2010 Issue of Backyard Poultry | Backyard Poultry Magazine." Backyard Poultry Magazine. Swift Communications Inc., 07 Feb. 2013. Web. 29 June 2015.